The DOMCharacterData::insertData() function is an inbuilt function in PHP which is used to insert a string at the specified 16-bit unit offset.
Syntax:
void DOMCharacterData::insertData( int $offset, string $data )
Parameters: This function accept two parameters as mentioned above and described below:
- $offset: It specifies the starting point to insert data.
- $data: It specifies the data to insert.
Return Value: This function does not return any value.
Below given programs illustrate the DOMCharacterData::insertData() function in PHP:
Program 1:
<?php   // Create a new DOM Document $dom = new DOMDocument('1.0', 'iso-8859-1');   // Create a div element $element = $dom->appendChild(new DOMElement('div'));   // Create a DOMCdataSection $text = $element->appendChild(         new DOMCdataSection('GeeksGeeks'));   // Insert 'For' between Geeks and Geeks $text->insertData(5, 'For');   echo $dom->saveXML(); ?> |
Output:
<?xml version="1.0" encoding="iso-8859-1"?> <div><![CDATA[GeeksForGeeks]]></div>
Use Chrome Developer tools to view the HTML or press Ctrl+U
Program 2:
<?php   // Create a new DOM Document $dom = new DOMDocument('1.0', 'iso-8859-1');   // Create a div element $element = $dom->appendChild(new DOMElement('div'));   // Create a DOMCdataSection $text = $element->appendChild(         new DOMCdataSection('My DOM Characters'));   // Insert in the beginning $text->insertData(0, 'Beginning');   echo $dom->saveXML(); ?> |
Output:
<?xml version="1.0" encoding="iso-8859-1"?> <div><![CDATA[BeginningMy DOM Characters]]></div>
Program 3:
<?php   // Create a new DOM Document $dom = new DOMDocument('1.0', 'iso-8859-1');   // Create a div element $element = $dom->appendChild(new DOMElement('div'));   // Create a DOMCdataSection $text = $element->appendChild(         new DOMCdataSection('My DOM Characters'));   // Insert in the end $text->insertData(17, 'End');   echo $dom->saveXML(); ?> |
Output:
<?xml version="1.0" encoding="iso-8859-1"?> <div><![CDATA[My DOM CharactersEnd]]></div>
Reference: https://www.php.net/manual/en/domcharacterdata.insertdata.php
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